
I'd suggest uninstalling Firefox and testing with Firefox ESR 38.7.1 (it's the current business class version, ESR = Extended Service Release, there's a new v 45 ESR but that's really still in the testing/Beta stage): <- scroll down past the Search box and on the right, click the Show: Firefox 38 to get the correct version listed, then select the version for your location. With any type of memory-related crashes in software, you'll need to rule out malware. There are no Bugzilla reports or correlations listed for it yet (Currently Ranked #163 here.) It's a memory allocation error, in jemalloc, that's been around since, there's been 160+ crashes from Firefox 45.01 alone in the last 3 days.
